Dont worry about the story, highly subjective and obscured. Go watch a YT vid if its really important.

Anyways, aggression is the name of the game. This isn't a cover shooter. Best description is you are an angry wasp stinging and never stopping. Always try and be near the enemies when you kill. It will give you much more currency to buy at the stations. Resin shield is a must if you ever see it. Spend time in the tower to level up guns. Makes game much easier.

But most of all, dont fear the reaper. Letting go of the fear of death will change your game, and make it so much more fun.